摘要
研究了用钛白废酸处理硫酸渣,降低硫酸渣中硫、砷等杂质含量,再经重选得到铁精粉,考察了废酸浓度、液固体积质量比、反应时间等对硫酸渣脱硫脱砷的影响。结果表明:在废酸质量浓度120g/L、液固体积质量比2.5、温度30℃条件下搅拌3h,硫酸渣中铁质量分数达57.02%,硫、砷质量分数分别降至0.45%和0.05%;进一步重选得到铁质量分数62.5%的铁精粉。处理过程中产生的废水用电石渣中和后可循环使用,实现了“以废治废”。
The high-quality powdered iron was prepared by the reactions of titanium waste acid and pyrite cinder to decrease impurities of sulfur and arsenic and gravity separation.The effects of waste acid concentration,liquid-to-solid ratio,reaction temperature and reaction time on desulfurization and dearsenification were discussed.The results show that iron,sulfur and arsenic contents are 57.02%,0.45%and 0.05%,respectively under the optimized conditions of waste acid concentration of 120g/L,liquid-to-solid ratio of 2.5,30℃and 3hours.The high-quality powdered iron(Fe content is 62.5%)is obtained by gravity separation.In the process,the waste water can be recycled after being neutralized with carbide slag.Waste control by wastes is realized in the whole process.
作者
王吉华
高建明
WANG Jihua;GAO Jianming(Chemistry and Chemical Engineering Department,Yunnan Normal University,Kunming 650500,China;PanzhihuaYuming Technology Company,Panzhihua 617000,China)
出处
《湿法冶金》
CAS
北大核心
2020年第3期237-240,共4页
Hydrometallurgy of China
基金
国家科技支撑计划项目(2015BAB19B00)。
关键词
钛白废酸
硫酸渣
铁精粉
制备
titanium waste acid
pyrite cinder
powdered iron
preparation
